‘It is a horrifying crime which underlines how porn is too readily available to juveniles.

‘I hope that the internet service providers recognise that they have greater responsibilities for controlling access to porn.’

According to the Xbox customer support website, users can customise their access to games, films and television content to stop children viewing unsuitable material.

Jon Brown, NSPCC specialist for tackling sexual abuse, said porn could ‘warp’ children’s views of what was normal sexual behaviour and how they treat others.

He said: ‘We know that the vast amount of inappropriate, unrealistic and sometimes downright harmful pornography some children are exposed to through the internet can be extremely damaging to young minds.’

The victim is now being looked after by specialist officers and is reported to be ‘recovering well’.